11051541512521 has 2 divisors, whose sum is σ = 11051541512522. Its totient is φ = 11051541512520.

The previous prime is 11051541512509. The next prime is 11051541512639. The reversal of 11051541512521 is 12521514515011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8947486825225 + 2104054687296 = 2991235^2 + 1450536^2 .

It is a cyclic number.

It is not a de Polignac number, because 11051541512521 - 2¹⁹ = 11051540988233 is a prime.

It is not a weakly prime, because it can be changed into another prime (11051541512821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5525770756260 + 5525770756261.

It is an arithmetic number, because the mean of its divisors is an integer number (5525770756261).

Almost surely, 2^{11051541512521} is an apocalyptic number.

It is an amenable number.

11051541512521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11051541512521 is an equidigital number, since it uses as much as digits as its factorization.

11051541512521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10000, while the sum is 34.

The spelling of 11051541512521 in words is "eleven trillion, fifty-one billion, five hundred forty-one million, five hundred twelve thousand, five hundred twenty-one".